First let me start this question with NO !
I am not wanting to build or modify a weapon into something illegal !!!
A friend and I were wondering while looking at ebay online auction, how people are selling M16 parts.( fire control parts, etc. ) I know its illegal to have any of these parts if you own a weapon they will fit in and don't have the right license , is it illegal to sell those parts to people if they don't have the right license ? What is the law ???
I've got coffee and a doughnut bet on this !!
Thanks for all replies!!!
Buck

It is perfectly legal to sell these to someone with a registered gun, or to someone who didn't own a rifle they would fit in, so the sellers have no problem (remember: Sarco sold them in the first place).
According to BATF, it would be illegal for someone with an AR15 (and no registered M16) to be in possession of those parts.
-Troy

What Troy said with a wrinkle: If the parts, together, are intended solely for the purpose of converting semi to full, they connot be possesed (unless you have a stamp and they are replacement parts- and you don't have them next to a semi AR).